TW201619489A - Window shade and actuating system thereof - Google Patents

Abstract

An actuating system for a window shade includes a suspension member, a casing having a fixed protrusion, a transmission axle disposed through the casing, a rotary drum arranged in the casing and rotationally coupled with the transmission axle, and an impeding part connected with the rotary drum and affixed with an end of the suspension member. The rotary drum is rotatable in a first direction for winding the suspension member, and in a second direction for unwinding the suspension member. The impeding part is movable relative to the rotary drum between a first and a second position, the impeding part when in the first position being movable with the rotary drum past the protrusion in any of the first and second direction, and the impeding part when in the second position being engageable with the protrusion to block rotation of the rotary drum in the second direction.

Description

Curtain and its actuation system

The present invention relates to a window covering, and more particularly to a braking system for a window covering.

There are many types of curtains sold on the market, such as movable venetian blinds, roller blinds, and honeycomb curtains. When the curtain is lowered, the range of the window frame can be covered to reduce the amount of light entering through the window and enhance privacy. In general, the operating cords provided by the curtains are used to raise or lower the curtains. The curtain can be raised by winding the suspension rope on the drum, and the curtain can be lowered when the suspension rope is unfolded from the drum. In order to ensure that the curtains can be operated in the same manner, when the curtains reach the lowest position, the rollers can also be stopped by a limiting mechanism. However, conventional limit mechanisms usually consist of a specific modular mechanism that requires additional assembly space, which results in a more complex structure.

Therefore, it is one of the current important research and development topics to have the curtains of the improved actuation system, and it is convenient to operate and solve the above problems, and has become an object of great improvement in the related fields.

The present invention is to provide a window covering and an actuation system thereof that solve the prior art problems. In one embodiment, the present invention provides an actuating system for a curtain comprising: a suspension; a housing having a fixed projection; a drive shaft mounted through the housing; a drum, Provided in the housing and rotatably coupled to the drive shaft, the drum is rotatable in a first direction to retract the suspension, and the drum is rotatable in a second direction for the suspension to a drum unfolding; and a blocking member coupled to the drum and fixed to an end of the suspension member, the blocking member being movable relative to the rotating drum between the first position and the second position, when When the blocking member is in the first position, the rotating body can be displaced through the convex body in the first direction or the second direction, and when the blocking member is in the second position, the convex body can be engaged with the convex body. The drum is prevented from rotating in the second direction.

The curtain can integrate the limiting mechanism into the winding unit of the curtain to reduce the overall space of the actuation system.

100,200‧‧‧ curtains

102‧‧‧ top rail

104‧‧‧ ‧ blinds

106‧‧‧ bottom

108‧‧‧ lumen

110, 210‧‧‧ actuation system

112‧‧‧ drive shaft

114‧‧‧Control Module

116, 116'‧‧‧ Winding unit

118‧‧‧suspension

118A, 118B‧‧‧ end

120, 222‧‧‧ clutch

122‧‧‧ring rope

122A, 122B‧‧‧rope

124‧‧‧Inside pulley

126‧‧‧Shell

126A‧‧‧ Lower case

126B‧‧‧Upper casing

126C, 126D‧‧‧ openings

126E‧‧‧ inner side wall

128‧‧‧ reel

128A‧‧‧ outer surface

128B, 128C‧‧‧ end

130‧‧‧blocking parts

130A‧‧‧Connecting Department

End of 130B‧‧‧

130C‧‧‧ convex

131‧‧‧End cover

132‧‧‧Fixed convex body

133‧‧‧Central central through hole

136‧‧‧ lumen

137‧‧‧ shaft parts

138‧‧‧ positioning parts

138A‧‧‧Stop Department

204‧‧‧ blades

220‧‧‧ tilting mechanism

224‧‧‧Connecting Department

226‧‧‧ pulley

227‧‧‧ladder rope

228, 250‧‧‧torsion spring

228A, 228B, 250A, 250B‧‧‧ cutting-edge

230‧‧‧ collar

232, 234‧‧ ‧ sleeve department

236‧‧‧ holes

238‧‧‧Sleeve

242A, 242B‧‧‧Flange surface

244‧‧‧stop ribs

246‧‧‧Cylinder

248‧‧‧ inner side wall

252‧‧‧Acoustic Department

256‧‧‧Flange

257‧‧‧ gap

258‧‧‧Central Hole

259‧‧‧ Ring body

260‧‧ ‧ convex

262‧‧‧ hole

A1, A2, B1, B2‧‧‧ displacement distance

LP‧‧‧ lowest position

N‧‧‧ Torque

R1, R2‧‧‧ direction

V‧‧‧ vertical axis

X‧‧‧ longitudinal axis

FIG. 1 is a perspective view of a window covering according to an embodiment of the present invention.

Fig. 2 is a plan view showing the curtain of Fig. 1.

Fig. 3 is a schematic view showing the curtain of Fig. 1 in a completely lowered state.

Fig. 4 is a schematic view showing the winding unit provided in the curtain of Fig. 1.

Fig. 5 is an exploded view showing the winding unit of Fig. 4.

Fig. 6 is a partial cross-sectional view showing the winding unit of Fig. 4.

Fig. 7 is a schematic view showing a part of the casing provided in the winding unit of Fig. 4.

Fig. 8 is a partial cross-sectional view showing the blocking member provided in the winding unit along the section S-S in Fig. 6.

Figure 9 is a schematic view showing the middle position of the curtain above the lowest position.

Figure 10 is a side view showing the curtain of Figure 9.

Figure 11 is a schematic view showing the operation of the winding unit when raising the bottom of the curtain.

Figure 12 is a cross-sectional view showing the operation of the winding unit when raising the bottom of the window covering.

Figure 13 is a schematic view showing the operation of the winding unit when the bottom of the curtain is lowered.

Figure 14 is a cross-sectional view showing the operation of the winding unit when the bottom of the curtain is lowered.

Figure 15 is a schematic view showing the curtain being operated to lower the bottom to the lowest position.

Figure 16 is a schematic view showing the operation of the blocking member in the winding unit when the bottom is lowered to the lowest position.

Fig. 17 is a partial cross-sectional view showing the operation of the blocking member in the winding unit when the bottom portion is lowered to the lowest position, corresponding to the state shown in Fig. 16.

Figure 18 is a schematic view showing that the blocking member is in contact with the fixed convex body to prevent the winding unit from rotating when the bottom is lowered to the lowest position.

Figure 19 is a partial cross-sectional view showing the state in which the blocking member is in contact with the fixed convex body, corresponding to the state shown in Figure 18.

Figure 20 is a schematic view showing the curtain being operated to raise the bottom from the lowest position.

Figure 21 is a schematic view showing the winding unit rotating to raise the bottom from the lowest position.

Figure 22 is a partial cross-sectional view showing the winding unit rotated to raise the bottom from the lowest position.

Figure 23 is a schematic view showing a curtain provided by another embodiment of the present invention.

Fig. 24 is a schematic view showing the winding unit provided in the curtain of Fig. 23.

Fig. 25 is an exploded view showing the winding unit of Fig. 24.

Figure 26 is a cross-sectional view showing the winding unit of Figure 24 along the longitudinal axis.

Figure 27 is a partial cross-sectional view showing the tilt mechanism integrated in the winding unit along the section P1-P1 in Figure 26.

Fig. 28 and Fig. 29 are partial cross-sectional views showing the operation of the tilting mechanism along the section P2-P2 in Fig. 26.

Figure 30 is a cross-sectional view showing the clutch integrated in the winding unit of Figure 24 along the section P3-P3 in Figure 26.

Figure 31 is a schematic view showing the curtain of Figure 23 in an intermediate position.

Figure 32 is a partial clutch diagram showing the corresponding figure 31 A schematic representation of the state of the curtain position.

Fig. 33 is a schematic view showing that the curtain of Fig. 23 is operated to adjust the inclination angle of the blade.

Fig. 34 is a schematic view showing the corresponding operation of the tilting mechanism when the curtain is subjected to the operation shown in Fig. 33.

Fig. 35 is a schematic view showing that the curtain of Fig. 23 is operated to adjust the inclination angle of the blade toward the other direction.

Fig. 36 is a schematic view showing the corresponding operation of the tilting mechanism when the curtain is subjected to the operation shown in Fig. 35.

Figure 37 is a cross-sectional view showing the operation of the clutch when the tilting mechanism performs the operation shown in Figure 34.

Figure 38 is a cross-sectional view showing the operation of the clutch when the tilting mechanism performs the operation shown in Figure 36.

Figure 39 is a schematic view showing the operation of the curtain of Figure 23 when the bottom is lowered.

Fig. 40 is a cross-sectional view showing the corresponding actuation generated in the clutch when the curtain performs the operation shown in Fig. 39.

Figure 41 is a schematic view showing the operation of the curtain of Figure 23 when the bottom is raised.

Fig. 42 is a cross-sectional view showing the corresponding operation generated in the clutch when the curtain performs the operation shown in Fig. 41.

1 is a schematic view showing a window covering 100 according to an embodiment of the present invention. FIG. 2 is a plan view showing the curtain 100, and FIG. 3 is a schematic view showing the curtain 100 in a fully lowered state. The window covering 100 includes a top rail 102, a blind 104, and a bottom 106 disposed at a lower end of the blind 104. The top rail 102 can be of any kind and shape. The top rail 102 can be secured above the sash and the shade 104 and bottom 106 can be suspended from the top rail 102. Further, the top rail 102 has an internal cavity 108 for mounting the actuation system 110, and the actuation system 110 can drive the bottom 106 of the blind 104 to perform lifting and lowering operations.

The blind 104 can have any suitable configuration, for example, the blind 104 can comprise a honeycomb structure (as shown) made of cloth, a venetian blind structure, or a plurality of vertically extending and mutually parallel rails or blades.

The bottom portion 106 is disposed at the lower end of the window covering 100 and is movable relative to the top rail 102 to extend and overlap the shade 104. In an embodiment, the bottom portion 106 can be an elongated rail. However, any structure having a weight can be applied. In some embodiments, the bottom portion 106 can also be the lowermost end of the shade 104.

The actuation system 110 disposed in the top rail 102 can include a drive shaft 112, a control module 114, one or more winding units 116, and one or more suspensions respectively coupled to the winding unit 116. 118. Suspension 118 can be a sling that extends vertically between top rail 102 and bottom 106. The first end portion 118A of each suspension member 118 is coupled to its corresponding winding unit 116 (as shown in FIG. 5), and the second end portion 118B of each suspension member 118 is coupled to the bottom portion 106. The winding unit 116 can wind and unfold the suspension 118 to raise and lower the bottom 106, respectively. The drive shaft 112 can extend along the length of the top rail 102 to define a longitudinal axis X, and the control module 114 and the volume The winding unit 116 can be coaxially coupled to the drive shaft 112. By operating the control module 114, the drive shaft 112 can be driven to rotate, which in turn drives the winding unit 116 to rotate synchronously, thereby winding or unwinding the suspension 118.

Control module 114 can have any suitable configuration to drive drive shaft 112 to rotate to raise or lower bottom 106. In one embodiment, the control module 114 has, for example, a conventional configuration including a clutch 120 and a loop 122 coupled to the clutch 120. The clutch 120 can typically have a pulley 124 (shown in phantom in FIG. 2) that is fixed to the drive shaft 112, and the loop 122 is wound around the pulley 124 and defines two rope segments 122A on the outside of the top rail 102 and 122B is for manual operation. By pulling the cord section 122A, the pulley 124 and the drive shaft 112 can be rotated in the first direction to raise the bottom 106. By pulling down the other rope segment 122B, the pulley 124 and the drive shaft 112 can be rotated in the opposite second direction to lower the bottom portion 106.

4 is a schematic view showing the winding unit 116, FIG. 5 is an exploded view showing the winding unit 116, and FIG. 6 is a partial cross-sectional view showing the winding unit 116. The winding unit 116 can include a housing 126, a drum 128, and a blocking member 130. The housing 126 can be secured to the top rail 102. In one embodiment, the housing 126 can be comprised of a lower housing 126A and an upper housing 126B and defines an internal cavity for placing the drum 128. Moreover, the housing 126 has openings 126C and 126D through which the drive shaft 112 can pass in two opposing side walls. The housing 126 also includes a fixed projection 132 that projects inwardly from the inner sidewall 126E of the housing 126. As shown in Fig. 7, the projection 132 can be integrally formed with the housing 126 (e.g., the upper housing 126B).

The drum 128 can be coaxially mounted on the housing 126 and rotatably coupled The drive shaft 112 is connected. For example, the housing 126 can be pivotally connected to the end cover 131, the reel 128 can be fixed to the end cover 131, and the transmission shaft 112 can be fitted through the end cover 131 and the inner central through hole 133 of the reel 128, respectively, so that the transmission The shaft 112 and the drum 128 are rotationally locked. Thus, the longitudinal axis X of the drive shaft 112 can also define the pivot axis of the drum 128. The drum 128 has an outer surface 128A extending along the longitudinal axis X between its two opposite end portions 128B and 128C. Outer surface 128A has an opening 134 near end portion 128B and opening 134 is communicated to lumen 136 of drum 128. The drum 128 is disposed in the housing 126 such that the end portion 128B is located adjacent to the region of the housing 126 where the fixed projection 132 is disposed.

With reference to Figs. 4-7, Fig. 8 is a cross-sectional view showing the blocking member 130 assembled in the winding unit 116 along a section S-S perpendicular to the longitudinal axis X in Fig. 6. Referring to Figures 4-8, the blocking member 130 is coupled to the drum 128 at a position near the end portion 128B, and the blocking member 130 is fixed to the distal end portion 118A of the suspension member 118. The assembly of the blocking member 130 and the drum 128 allows the blocking member 130 to be moved relative to the drum 128 between the first position and the second position, wherein the blocking member 130 is retracted toward the interior of the drum 128 in the first position. The blocking member 130 substantially protrudes from the outer surface 128A of the drum 128 when in the second position. In one embodiment, the blocking member 130 can be integrally formed and pivotally coupled to the rotating barrel 128 via the shaft member 137, wherein the shaft member 137 is disposed adjacent to the inner cavity 136. More specifically, the blocking member 130 may have a connecting portion 130A through which the shaft member 137 passes, and a distal end 130B formed away from the connecting portion 130A. The shaft member 137 is located at a position offset from the longitudinal axis X and extends parallel along the longitudinal axis X. Therefore, the blocking member 130 can be rotated relative to the rotation The barrel 128 pivots between a first position and a second position, wherein the end 130B is maintained below the outer surface 128A of the drum 128 or substantially flush with the outer surface 128A when the blocking member 130 is in the first position, The end 130B projects outwardly from the outer surface 128A when the blocking member 130 is in the second position.

The distal end portion 118A of the suspension 118 is fixed to the blocking member 130 at a position offset from the shaft member 137, and the distal end portion 118A and the blocking member 130 are movable together with respect to the drum 128. The suspension 118 can be wrapped around the outer surface 128A from the distal end portion 128B of the drum 128 toward the other opposite end portion 128C.

With continued reference to Figures 5-8, the drum 128 can also be secured to a locating member 138. A keeper 138 can be disposed adjacent the barrier 130 and the keeper 138 can be used to maintain the barrier 130 in a first position that is retracted into the interior of the drum 128. In one embodiment, the positioning member 138 can be formed of a metal plate, and the positioning member 138 can be formed with a protruding stop portion 138A, and the blocking member 130 can be fixed with a convex body 130C (the convex body 130C can be blocked with the blocking member) 130 is integrally formed), and the convex body 130C is located away from the shaft member 137 and adjacent to the stopper portion 138A). The blocking member 130 can be maintained at a position retracted toward the inside of the drum 128 by the engagement of the stopping portion 138A with the convex body 130C.

The operation of the actuation system 110 of the window covering 100 is illustrated with reference to Figures 1-8. The window covering 100 can be operated between a fully raised state (as depicted in FIG. 1) and a fully deployed state (as depicted in FIG. 3), wherein: in the fully raised state, the blinds 104 are overlapped and The bottom portion 106 is adjacent to the top rail 102; in the fully deployed state, the bottom portion 106 is located at a lowest position vertically away from the top rail 102.

See Figures 9 and 10, when the bottom 106 is above the lowest position. In the position, the bottom cord 106 can be raised or lowered by operating the loop 122 of the control module 114. For example, the cord segment 122A of the loop 122 can be pulled down to urge the drive shaft 112 and the drum 128 to rotate in a first direction R1 to urge the bottom 106 to rise (as shown in Figures 11 and 12). Additionally, another cord segment 122B of the loop 122 can be pulled down to urge the drive shaft 112 and the drum 128 to rotate in the second direction R2, thereby lowering the bottom portion 106 (as shown in Figures 13 and 14). As long as the suspension member 118 is wound around the outer surface 128A for at least one turn, the protrusion 130C of the blocking member 130 can be engaged with the stopping portion 138A of the positioning member 138 to maintain the blocking member 130 retracted into the rotating barrel 128. The cavity 136 is in a static position relative to the drum 128. In this position, the end 130B of the blocking member 130 can remain retracted below the outer surface 128A, the drum 128 can be rotated in either direction to wind or unfold the suspension 118, and the blocking member 130 can be coupled to the drum 128 It rotates synchronously and passes through the convex body 132 of the housing 126.

Referring to Figures 15-19, when the bottom 106 is moved down to the lowest position LP shown in Figure 15, the deployed suspension 118 is mostly or completely exiting the outer surface 128A of the drum 128, allowing the outer surface The 128A no longer withstands the gravity of the bottom 106 sagging. Therefore, the gravitational load generated by the bottom 106 sagging can be transmitted to the blocking member 130 through the suspension 118. Due to the relative position of the blocking member 130, the gravity load generated by the bottom portion 106 can pull down the blocking member 130, causing the blocking member 130 to overcome the obstruction caused by the stopping portion 138A of the positioning member 138 (for example, through its elastic deformation), and Pivoting relative to the drum 128 to project outwardly from the outer surface 128A. As shown in Figures 16-17, the end 130B of the blocking member 130 is thus displaced from a first position that is retracted toward the drum 128 to a second position that projects outwardly from the outer surface 128A of the drum 128. Set. As the drum 128 rotates and urges the blocking member 130 to displace in the second direction R2, the outwardly projecting end 130B can be displaced to the fixed projection 132 on the abutment housing 126, as shown in Figures 18 and 19. In this way, the drum 128 and the drive shaft 112 can stop continuing to rotate in the second direction R2, thereby blocking the rope segment 122B of the loop 122 from moving further downward.

With the above structure, the blocking member 130 interferes with the fixing protrusion 132 of the housing 126 to prevent the bottom portion 106 from being adjacent to the lowest position LP. The blocking member 130, the positioning member 138 and the fixing protrusion 132 can form a limiting mechanism to define the number of revolutions of the rotating cylinder 128 for rotating the bottom portion 106 from the top rail 102 to a preset lowest position LP. Thus, the actuation system 110 can operate consistently, i.e., the cord section 122A of the pull-down loop 122 will only drive the bottom 106 to rise, and the cord section 122B of the pull-down loop 122 will only drive the bottom 106 down. In order to ensure that the blocking member 130 will abut against the fixing protrusion 132 after extending out of the drum 128, the fixing protrusion 132 can be disposed at a position offset from the vertical axis V (as shown) or on the vertical axis V. The upper position is below the drum 128, wherein the vertical axis V passes through the axis of rotation of the drum 128.

Referring to Figures 20-22, when the bottom 106 is raised from the lowest position LP, the string 122A of the loop 122 can be pulled down to drive the drive shaft 112 and the drum 128 to rotate in the direction R1. Rotation of the drum 128 can dislodge the blocking member 130 from the fixed projection 132 and change the orientation of the blocking member 130 relative to the vertical direction of the gravitational load applied by the bottom portion 106. Thus, the gravitational load applied by the bottom 106 can pull the blocking member 130 to rotate relative to the drum 128 toward the inner cavity 136. Therefore, the convex body 130C of the blocking member 130 can be urged to engage with the stopper portion 138A of the positioning member 138 (for example, elastically deformed and engaged), The blocking member 130 can be held relative to the drum 128 in a position that is retracted into the inner cavity 136 of the drum 128. In one embodiment, the fixed protrusion 132 urges the blocking member 130 toward the inner cavity 136 when the drum 128 is rotated one turn from the fully extended position.

It is worthy of a problem that the limiting mechanism of the present invention can be applied to any type of curtain that uses a rotating drum to wind or unfold a suspension, such as a honeycomb curtain, a roller blind, a venetian blind, and the like.

Figure 23 is a schematic illustration of an actuation system 210 suitable for use in a window covering 200 in accordance with another embodiment of the present invention. As before, the window covering 200 has a top rail 102, a shade 104 including a plurality of blades 204, and a bottom portion 106 disposed at the lower end of the shade 104. The blade 204 and the bottom 106 can be suspended from the top rail 102 and the bottom 106 can be moved vertically relative to the top rail 102 to extend or overlap the blade 204 between the top rail 102 and the bottom 106.

The actuation system 210 can include a drive shaft 112, a control module 114, one or more winding units 116', and one or more suspensions 118 that are coupled to the winding unit 116', respectively. As previously described, the drive shaft 112 can be driven to rotate to raise or lower the bottom portion 106 by operating the control module 114. Furthermore, the winding unit 116' can rewind or unfold the suspension 118 so that the bottom 106 rises or falls.

Figure 24 is a schematic view showing the winding unit 116', and Figures 25 and 26 are an exploded view and a cross-sectional view, respectively, of the winding unit 116'. As before, the winding unit 116' can have a housing 126, a drum 128, and a stop 130. The drum 128 can be rotated synchronously with the drive shaft 112 to retract the corresponding suspension member 118 and drive the bottom portion 106 up, or to unfold the corresponding suspension member. 118 and lowers the bottom 106. Furthermore, the drum 128 can also be assembled with the blocking member 130 and the positioning member 138 adjacent to the distal end portion 128B. The structure and operation of the blocking member 130 and the positioning member 138 are similar to those described above. The keeper 138 can retain the blocking member 130 in the retracted position such that the blocking member 130 and the drum 128 can be rotated synchronously through the fixed projection 132 of the housing 126 to retract or unfold the suspension. The gravitational load of the bottom portion 106 can drive the blocking member 138 from the retracted position to the extended position, causing the blocking member 138 to interfere with the fixed projection 132 of the housing 126 such that the bottom portion 106 stops adjacent the lowest position.

Referring to Figures 23-26, the actuation system 210 further includes a tilt mechanism 220 and a clutch 222 that are integrated with the winding unit 116', respectively. The tilt mechanism 220 can be used to adjust the tilt angle of the blade 204, and the clutch 222 can be used to maintain the bottom 106 at a predetermined height.

With reference to Figures 25-26, Figures 27 and 28 are cross-sectional views showing the assembly of the tilt mechanism 220, along sections P1-P1 and P2-P2, respectively, perpendicular to the longitudinal axis X in Figure 26. Referring to Figures 25-28, the tilt mechanism 220 can include a connecting portion 224, a pulley 226, a ladder cord 227, and a torsion spring 228, which can be disposed in the housing 126. The connecting portion 224 can include a collar 230 and two sleeve portions 232 and 234 that are fixed to the collar 230 and extend axially. The collar 230 projects radially with respect to the sleeve portions 232 and 234, and the sleeve portions 232 and 234 are elongated in an axial shape extending on opposite sides of the collar 230. The hole 236 is formed by the collar 230 and the sleeve portions 232 and 234. The connecting portion 224 is pivotally connected through the housing 126, and the sleeve portion 232 is mounted through the inner central through hole 133 of the drum 128, and the transmission shaft 112 can extend through the collar 230 and the hole 236 of the sleeve portion 232, 234. Connection portion 224 The bore 236 can be mated with the drive shaft 112 and the inner central through bore 133 of the drum 128 has a larger diameter than the cross section of the sleeve portion 224. Accordingly, the connecting portion 224 is rotatably coupled to the drive shaft 112 and allows relative rotation between the drum 128 and the connecting portion 224.

The pulley 226 can be secured with a sleeve 238 that projects axially from the side of the pulley 226 that faces the collar 230. In one embodiment, the pulley 226 and the sleeve 238 can be integrally formed. The pulley 226 and the sleeve 238 can be assembled around the sleeve portion 234 and the drive shaft 112 adjacent the distal end portion 128A of the drum 128, and the sleeve portion 234 passes through the central bore 240 of the pulley 226. The assembly of the sleeve portion 234 by the pulley 226 allows the connecting portion 224 to rotate about the longitudinal axis X relative to the pulley 226, and the pulley 226 can be rotated independently of the drum 128.

As shown in Fig. 28, the pulley 226 can also include two flange surfaces 242A, 242B that are separated from each other by an angle with respect to the longitudinal axis X. The range of rotation of the pulley 226 can be defined by two positions: the first position is the position of the corresponding flange 242A contacting the stop rib 244 of the housing 126, and the second position is the flange surface 242B contacting the stop rib 244 location. The action of the flange surface 242A against the stop rib 244 defines the maximum angle of inclination of the blade 204 in the first direction (as shown in Figure 28), while the flange surface 242B is in conflict with the stop rib 244. The action defines the maximum angle of inclination of the blade 204 in a second direction opposite the first direction (as shown in Figure 29).

The ladder cord 227 can be coupled to the pulley 226 and secured to the blade 204, respectively. The rotation of the pulley 226 drives the ladder cord 227 to be vertically displaced so that The blade 204 is tilted.

Referring to Figures 25-27, the torsion spring 228 includes two spaced apart tips 228A, 228B and can be configured as a sleeve 238 that frictionally contacts the pulley 226. The collar 230 of the connecting portion 224 has a projecting post 246 that is offset from the longitudinal axis X and is disposed in a gap defined between the two tips 228A, 228B.

Rotation of the drive shaft 112 can drive the coupling portion 224 to rotate and cause the cylinder 246 to push one of the tips 228A, 228B, causing the torsion spring 228 and pulley due to frictional contact between the sleeve 238 of the pulley 226 and the torsion spring 228. The 226 is rotated relative to the drum 128. Moreover, the action of the stop rib 244 against any of the flange surfaces 242A, 242B prevents the pulley 226 from rotating, causing the torsion spring 228 to the sleeve 238 when the drive shaft 112 and the connecting portion 224 are further rotated. The upper shaft is loosened so that the drive shaft 112, the connecting portion 224 and the drum 128 can continue to rotate to retract or unfold the suspension, while the pulley 226 can remain stationary.

Referring to Figures 25-26, the clutch 222 can have a locked state and an unlocked state: the clutch 222 is frictionally engaged with the inner sidewall 248 of the housing 126 when the clutch 222 is in the locked state to prevent the drum 128 from moving toward the unfolding suspension 118. Rotating; when the clutch 222 is in the unlocked state, the drum 128 is allowed to rotate to retract and unfold the suspension 118. Moreover, the clutch 222 can also be triggered when the drive shaft 112 rotates in one of the directions to switch the clutch 222 from the locked state to the unlocked state.

Clutch 222 may be disposed in housing 126 adjacent end portion 128B of drum 128. More specifically, the clutch 220 can include a torsion spring 250 and a Actuator 252. Figure 30 is a cross-sectional view showing the combination of the torsion spring 250 in the clutch 222 along a section P3-P3 perpendicular to the longitudinal axis X in Figure 26. The torsion spring 250 has two spaced apart tips 250A, 250B and can be configured to frictionally contact the inner sidewall 248 of the housing 126. The position of the torsion spring 250 is such that the flange 256 to which the drum 128 is attached falls into the gap 257 between the two tips 250A, 250B. The flange 256 is offset from the longitudinal axis X and the width of the gap 257 is equal to or greater than the width of the flange 256. In one embodiment, the drum 128 is affixed to a ring body 259 adjacent thereto, for example, and a flange 256 is formed on the ring body 259. In another embodiment, the flange 256 can be integrally formed with the drum 128. The flange 256 can move with the drum 128 relative to the torsion spring 250 to push any of the tips 250A or 250B to cause the torsion spring 250 to expand and frictionally contact the inner sidewall 248 of the housing 126, thereby preventing the drum 128 from unfolding toward the suspension. The direction of the hanger 118 is rotated.

The actuation portion 252 can be assembled by a torsion spring 250. The actuation portion 252 can have a central aperture 258 and a protrusion 260 that is secured to the actuation portion 252 and that projects radially from the outer surface of the actuation portion 252. A portion of the sleeve portion 232 that extends from the drum 128 and is located adjacent the end portion 128B can be received in the central aperture 258 of the actuator portion 252. Therefore, the sleeve portion 232 can assist in supporting the actuation portion 252. Additionally, the actuator 252 can also include a bore 262 through which the drive shaft 112 can extend through the interior of the drum 128 and rotatably couple the actuator 252 to the drive shaft 112. The drive shaft 112 can drive the actuator 252 to rotate such that the projection 260 pushes against any of the tips 250A or 250B to release the frictional contact between the torsion spring 250 and the inner sidewall 248 of the housing 126, thereby rotating the drive shaft 112. It can be transmitted to the drum 128 through the actuating portion 252 and the torsion spring 250.

In conjunction with Figures 23-30, the operation of the actuation system 210 will be described with additional reference to Figures 31-42. 31 and 32 illustrate the state in which the control module 114 remains static and the user does not pull the loop 122. The vertical gravitational force exerted by the bottom portion 106 on the suspension member 118 can produce a torsion N to the drum 128 to cause the drum 128 to rotate, causing the flange 256 to push the tip end 250A of the torsion spring 250. This pushing action acts to urge the tip 250A to move away from the tip 250B (even if the gap 257 is widened), thereby forcing the torsion spring 250 to expand and frictionally contact the inner sidewall 248 of the housing 126 (as shown in Figures 25 and 26). ). The frictional contact between the torsion spring 250 and the housing 126 counteracts the torque N received by the drum 128 due to vertical gravity to prevent the torsion spring 250 and the drum 128 from rotating in the direction in which the bottom 106 is lowered. Thus, the bottom 106 can remain stationary at a desired height.

Referring to Figures 33 and 34 and Figures 26 and 27, when the user wants to adjust the inclination angle of the blade 204 in the first direction, the rope segment 122B of the pull-down ring 122 can be displaced by a distance B1 to drive the transmission shaft 112 and The connecting portion 224 is rotated in the direction R2 to push the cylinder 246 one of the two tips 228A, 228B (for example, the tip 228A), so that the frictional contact between the torsion spring 228 and the sleeve 238 causes a twist Spring 228 and pulley 226 rotate synchronously relative to drum 128. Rotation of this pulley 226 can drive the ladder cord 227 to be vertically displaced such that the blade 204 is tilted toward the first direction as shown in Fig. 34. The pulley 226 will rotate until the stop rib 244 contacts the flange surface 242B, thereby forcing the pulley 226 to stop, wherein the contact of the stop rib 244 with the flange surface 242B can define a maximum angle of inclination of the blade 204 in the first direction.

Referring to FIGS. 35 and 36 and FIGS. 26 and 27, when the user wants to adjust the inclination angle of the blade 204 in the second direction opposite to the first direction, the rope segment 122A of the pull-down ring 122 can be displaced by a distance. A1, driving the drive shaft 112 and the connecting portion 224 to rotate in the direction R1, pushing the cylinder 246 to push the other of the two tips 228A, 228B (for example, the tip 228B), such that the torsion spring 228 and the sleeve The frictional contact between 238 causes the torsion spring 228 and the pulley 226 to rotate synchronously relative to the drum 128. Rotation of this pulley 226 can drive the ladder cord 227 to be vertically displaced such that the blade 204 is tilted toward the second direction as shown in Fig. 36. The pulley 226 will rotate until the stop rib 244 contacts the flange surface 242A, thereby forcing the pulley 226 to stop, wherein the contact of the stop rib 244 with the flange surface 242A can define a maximum angle of inclination of the blade 204 in the second direction.

It is worthwhile to note that when the pulley 226 is rotated to change the angle of inclination of the blade 204, the actuating portion 252 is also driven by the drive shaft 112 to rotate in the same direction as the pulley 226. However, as long as the stop rib 244 does not reach the flange surface 242A or 242B, the projection 260 of the actuating portion 252 does not push any of the tips 250A, 250B, and the torsion spring 250 does not contract. FIG. 37 is a schematic diagram showing the stroke of the convex body 260 when the blade 204 is adjusted as shown in FIG. 34; and FIG. 38 is a plan view showing the blade 204 when the adjustment is performed as shown in FIG. A schematic representation of the 260 moved itinerary. Thus, as the blade 204 adjusts the tilt angle, the vertical gravity applied by the bottom 106 to the drum 128 can continuously push the flange 256 to the tip 250A, thereby maintaining the torsion spring 250 in frictional contact with the housing 126. Therefore, as described above, when the blade 204 performs the adjustment of the tilt angle, the role of the torsion spring 250 The drum 128 and the bottom 106 can be kept static.

Referring also to Figures 39, 40 and 26-30, when the user is to lower the bottom 106, the rope segment 122B of the pull-down loop 122 is displaced by a distance B2, wherein the distance B2 ratio is the angle of inclination of the adjustment blade 204. The operation distance B1 performed is large. Therefore, the drive shaft 112 can rotate in the direction R2 and drive the connecting portion 224 and the actuating portion 252 to rotate in the same direction. Rotation of the connecting portion 224 causes the post 246 to push the tip 228A to urge the torsion spring 228 and the pulley 226 to rotate until the stop rib 244 abuts against the flange surface 242B, as previously described in FIG. After the stop rib 244 abuts against the flange surface 242B, as the rope segment 122B of the loop 122 continues to move downward, the pulley 226 remains stationary and the actuator 252 can continue to rotate with the drive shaft 112 in the direction R2 to force The projection 260 is displaced away from the tip 250A toward the tip end 250B. Therefore, the convex body 260 can push the tip end 250B of the torsion spring 250 to be displaced toward the narrowing gap 257, and the torsion spring 250 is tightened to release the frictional contact between the torsion spring 250 and the inner side wall 248 of the housing 126. Then, the loosened torsion spring 250 is rotatable with the actuating portion 252 and the drive shaft 112 in the direction R2, and the tip end 250B can push the flange 256 of the drum 128 such that the drum 128 rotates in the same direction R2, such as Figure 40 shows. The rotation of the torsion spring 250 by the drive shaft 112 is transmitted to the drum 128 through the contact between the tip 250B and the flange 256 of the drum 128, so that the drum 128 rotates in the direction in which the suspension 118 is deployed and the bottom 106 is lowered. .

After the downwardly moving bottom 106 reaches a desired height, the loop 122 can be lowered, such that the projection 260 no longer pushes the tip end 250B of the torsion spring 250. Therefore, the vertical gravity of the bottom 106 applied to the suspension 118 A torque N is generated on the drum 128 to cause the drum 128 to push the flange 256 against the tip 250A as shown in the previous figure 32. This thrust is directed toward the tip end 250A away from the tip 250B (i.e., the direction in which the gap 257 is enlarged) to urge the torsion spring 250 to expand and frictionally contact the inner sidewall 248 of the housing 126. The frictional contact between the torsion spring 250 and the housing 126 counteracts the torque applied by the vertical gravity to the drum 128 and prevents the torsion spring 250, the drum 128, and the drive shaft 112 from rotating in the direction R2 of deploying the suspension 118. Thus, the bottom 106 can remain static at the desired height.

Referring also to Figures 41, 42 and 26-30, when the user raises the bottom 106, the rope segment 122A of the pull-down loop 122 is displaced by a distance A2, wherein the distance A2 ratio is the angle of inclination of the adjustment blade 204. The operation distance A1 performed is larger. Therefore, the drive shaft 112 is rotatable in the direction R1 and drives the connecting portion 224 and the actuating portion 252 to rotate in the same direction. Rotation of the link 224 causes the post 246 to push the tip 228B to urge the torsion spring 228 and the pulley 226 to rotate until the stop rib 244 abuts against the flange surface 242A, as previously described in FIG. After the stop rib 244 abuts against the flange surface 242A, as the rope segment 122B of the loop 122 continues to move downward, the pulley 226 remains stationary, and the actuator 252 can continue to rotate with the drive shaft 112 to force the projection 260 It is away from the tip end 250B of the spring 250 and is displaced toward the tip end 250A. Accordingly, the protrusion 260 can push the tip end 250A of the torsion spring 250 to tighten the torsion spring 250 to release the frictional contact between the torsion spring 250 and the inner side wall 248 of the housing 126. Next, the loosened torsion spring 250 is rotatable with the actuating portion 252 such that the tip end 250A pushes the flange 256 of the drum 128 in the direction R1. The torsion spring 250 is rotated by the drive shaft 112 and is permeable to the tip 250A. The contact between the flanges 256 of the drum 128 is transmitted to the drum 128 such that the drum 128 rotates in the direction of retracting the suspension 118 and raising the bottom 106.

After the upwardly moving bottom 106 reaches a desired height, the loop 122 can be lowered, such that the projection 260 no longer pushes the tip end 250A of the torsion spring 250. Thus, the vertical gravitational force applied by the bottom portion 106 to the suspension member 118 creates a torque on the drum 128 to cause the drum 128 to rotate in the direction R2 and push the flange 256 toward the tip end 250A. Thereby, the torsion spring 250 can be enlarged and brought into frictional contact with the inner side wall 248 of the housing 126. The frictional contact between the torsion spring 250 and the housing 126 counteracts the torque generated by the vertical gravity against the drum 128 and prevents the torsion spring 250, the drum 128, and the drive shaft 112 from rotating in the direction R2 in which the suspension 118 is deployed. Thus, the bottom 106 can remain static at the desired height.

As previously discussed, when the drum 128 is rotated for retracting and unfolding the suspension 118, the keeper 138 maintains the blocking member 130 in the retracted position such that the blocking member 130 moves with the drum 128 through the housing 126. Fixed protrusion 132. In addition, when the bottom portion 106 is near the lowest position, the blocking member 138 is driven by the gravity load of the bottom portion 106 to move from the retracted position to the extended position, so that the blocking member 138 can be engaged with the fixed projection 132 of the housing 126. In order to prevent the bottom 106 from approaching the lowest position.

The structure and operation method of the present invention can define the number of rotations required for the rotating drum to lower the blind from the top rail to the lowest position, so that the rotating drum can automatically stop rotating when the falling curtain approaches the lowest position. . Thus, the actuation system can operate in unison to raise and lower the blinds of the curtain.

Although the present invention has been disclosed in the above embodiments, it is not used The invention is defined by the scope of the appended claims, and the scope of the invention is defined by the scope of the appended claims. Prevail.

100‧‧‧ curtains

102‧‧‧ top rail

104‧‧‧ ‧ blinds

106‧‧‧ bottom

108‧‧‧ lumen

110‧‧‧ actuation system

112‧‧‧ drive shaft

114‧‧‧Control Module

116‧‧‧Winding unit

118‧‧‧suspension

118B‧‧‧End

122‧‧‧ring rope

122A, 122B‧‧‧rope

X‧‧‧ longitudinal axis

Claims (24)

A curtain actuation system comprising: a suspension; a housing having a fixed projection; a drive shaft mounted through the housing; a drum disposed in the housing and rotatable Coupling the drive shaft, the drum is rotatable in a first direction to retract the suspension, and the drum is rotatable in a second direction for the suspension to be unfolded from the drum; and a blocking member, Connected to the drum and fixed to one end of the suspension member, the blocking member is movable relative to the rotating drum between the first position and the second position, when the blocking member is located in the first position The protrusion can be displaced through the protrusion in the first direction or the second direction, and when the blocking member is in the second position, the protrusion can be engaged with the protrusion to prevent the tube from moving to the second direction Turn. The actuation system of claim 1 wherein the blocking member is in the second position when the suspension is partially or fully deployed from the drum. The actuation system of claim 1, wherein the drum has a first end portion and a second end portion, the blocking member is coupled to the drum near the first end portion, and the suspension member The first end portion is wound around the drum toward the second end portion. The actuating system of claim 1, wherein the drum has an outer surface capable of winding the suspension, and an opening formed in the outer surface, the blocking member extending in the second position On the outer surface, the blocking member is retracted into the interior of the opening when in the first position. The actuation system of claim 1, wherein the blocking member is pivotally coupled to the drum through a shaft member and the shaft member extends parallel to the axis of the drum. The actuation system of claim 5, wherein the suspension is secured to the blocking member at a position offset from the shaft member. The actuating system of claim 1, further comprising a positioning member fixed to the rotating sleeve and adjacent to the blocking member, the positioning member for maintaining the blocking member in the first position. The actuation system of claim 7, wherein the positioning member includes a stop portion engageable with the stop portion to maintain the blocking member in the first position. The actuating system of claim 7, wherein the drum has an inner cavity and an outer surface capable of retracting the suspension, the blocking member extending from the outer surface when the second position is When the blocking member is in the first position, the blocking member is maintained in the inner cavity through the action of the positioning member. The actuation system of claim 1, wherein the drum is rotatable about a pivot axis that intersects a vertical axis and the protrusion is disposed at a position offset from the vertical axis. The actuation system of claim 1 further comprising a clutch having a locked state and an unlocked state, wherein the clutch is in a locked state to prevent the drum from rotating in the second direction, and the clutch is in an unlocked state to allow The drum rotates, and when the transmission shaft rotates, the clutch can be triggered to switch from the locked state to the unlocked state. The actuation system of claim 11, wherein the clutch is mounted in the housing adjacent to the drum, and the clutch is engaged with the side wall of the housing by friction during the locked state. . The actuating system of claim 11, further comprising a pulley mounted around the drive shaft, and a ladder cord connecting the pulley, wherein the drum has first and second end portions opposite to each other The clutch is disposed adjacent to the first end portion of the drum, and the pulley is disposed adjacent to the second end portion of the drum. The actuation system of claim 1, wherein the drum is fixed with a flange, and the actuation system further comprises: a torsion spring having two spaced apart tips and mounted to the housing The flange is disposed in a gap between the two tips, wherein the flange applies a force to either of the two tips to urge the torsion spring to frictionally contact a side wall of the housing to block Rotating the drum in the second direction; and the actuating portion is rotatably coupled to the drive shaft, wherein the actuating portion is drivable by the drive shaft to push any of the two tips, Thereby, the frictional contact between the torsion spring and the side wall of the casing is released, whereby the rotation of the transmission shaft can be transmitted to the drum through the actuating portion and the torsion spring. The actuation system of claim 14, wherein the torsion spring is rotated by the drive shaft to transmit to the drum through contact between the two tips and the flange. The actuating system of claim 14, wherein the actuating portion includes a protrusion, and the drive shaft and the actuating portion are synchronously rotatable relative to the drum to drive the protrusion away from the two tips The first tip is displaced toward the second of the two tips and the projection pushes the second tip to release frictional contact between the torsion spring and the sidewall of the housing. The actuating system of claim 14, wherein the actuating portion is mounted by the torsion spring, and the drive shaft extends through the drum and the actuating portion, respectively. The actuating system of claim 14, further comprising: a pulley fixed to a sleeve, and the pulley is wound around the drive shaft Surrounding; a ladder rope for connecting with the pulley; a second torsion spring having two spaced apart second tips and being arranged to frictionally contact the sleeve; and a connecting portion rotatable Coupling the drive shaft, wherein the connecting portion can be driven to rotate by the drive shaft to push any one of the two second tips and drive the second torsion spring and the pulley to rotate relative to the drum . The actuation system of claim 18, wherein the attachment portion has a sleeve portion that extends through the drum and is partially received within the actuation portion. The actuation system of claim 1, further comprising: a pulley fixed to a sleeve, the pulley being mounted around the drive shaft; a ladder rope connected to the pulley; a second a spring having two spaced apart second tips and configured to frictionally contact the sleeve; and a connecting portion rotatably coupling the drive shaft, wherein the connecting portion is drivable by the drive shaft Rotating to push any of the two second tips and drive the second torsion spring and the pulley to rotate relative to the drum. The actuation system of claim 20, wherein the connecting portion has a sleeve portion that extends through the interior of the drum. The actuating system of claim 20, wherein the pulley has first and second flange surfaces, the housing is fixed with a stop rib, and the range of rotation of the pulley is defined by the first and second corners Between the positions, the first angular position is a position corresponding to the first flange surface contacting the stop rib, and the second angular position corresponds to a position at which the second flange surface contacts the stop rib. A curtain comprising: a top rail, a bottom, and a blind disposed vertically between the top rail and the bottom; and an actuation system according to claim 1 disposed in the top rail, the actuation A second end of the suspension of the system is coupled to the base, and the drive shaft can drive the drum to rotate to raise and lower the bottom. The curtain according to claim 23, wherein when the suspension is partially or completely deployed from the drum, the gravity load generated by the bottom portion of the suspension member pulls the blocking member from the first position to The second position.